Iris diaphragm



R. KLEIN.

IRIS DlAPHRAGM.

APPLICATION FILED JUNE 30. 1920.

b 2332 Patented Jul 18, 1921 2 SHEETSSHEET 1.

BY W ATTORNEYS R. KLEiN.

IRIS DIAPHRAGM],

APPLICATION FILED JUNE 30. 1920.

Patented J uly 18, 1922;

2 SHEETSSHEET 2..

IN VENTOR.

JAZX/ATTORNEYS.

UNITED STATE-S FATENT RUDoLrH KLnrn', or noel-insane, new roe-1;, ro erron nocnnsrnn, new YORK, A oonrona'rron on NEW UFFICE.

IGAL COMPANY, YORK.

IRIS niarnnaola. I

Application filed June 36,

To all whomuit may concern .1

Be it known that l, RUDOLPH niacin, a

citizen of the United States, and resident of- Rochester, in the countyor Monroe and State of New York, haveinvcnted certain new and usefulImprovements in iris Diaphragms, of which the following is aspecification. I

The present invention relates to iris diaphragms for use in photographicshutters and other optical appliances, and an object thereof is toprovide an iris diaphragm in which the work of assembling the parts isreduced" to a minimum. Another object of the invention is to provide aconstruction which will permit the mounting of the blades upon theoperating ring while thelatter is separated from the supporting housingso that the blades may be more to the casing or support.

To these and other ends, the invention consists of certain parts andcombinations of parts all of which will be hereinafter described, thenovel features being pointed out in the appended claims.

In the drawings:

Fig. 1 is: a front View of an iris diaphragm constructed in accordancewith this inven tion;

Fig. 2 is a rear view of the iris diaphragm;

Figs. 3 and 4% are front and rear views of the operating ring detachedfrom the supporting housing and having the blades mounted thereon, theblades being shown in extreme open positions;

Fig, 5 is an enlarged view of the supporting member or casing with theshutter blades and operating ring removed;

Fig. 6 is an enlarged detail view of the rear face of the operating ringwith only one of the blades mounted thereon; and

Fig. 7 15 an enlarged edge view partially in sect-ion through thediaphragm as whole.

In the manufacture of. iris diaphragms prior to this invention, it hasbeen customary to provide two parts usually of annular form, oneactingas a casing or support and. the other as the operating member orring. The blades normally lie between these two parts and are usuallyassembled, first by connecting them at one end with the supportingcasing, and thereafter connecting the operating ring to their otherends. This as sembling operation has been tedious and required a greatdeal of skill, as the blades Specification of Letters Patent.

readily secured Sierial No. 393,068

must be fitted one a time to ring, and during the fitting of one blade abladev which has already been fitted is liable to become disconnectedfrom the operating ring.

According to this invention, the blades are connected one at a time toone of the aunt lar or ring members and i are extended throughtheopening of said member to the opposite side thereof 0 that theirother ends will overlap and be heldin frictional contact 111 openpositions whereby the openings therein may be simultaneously connected.to hearings on the other ring or annular mem her of the diaphragm, y

lh iferring to the embodiment of the invent on herein illustrated, 1indicates one of the ring or annular members of the diaphragm, being inthis instance the casing or support-- mg member witha surrounding wall 2and plurality of pivots or bearings 3 projecting from the member 1within the wall The other ring or annular member 4 is in this instancethe' operatingring, and it is held to the supporting ring 1 by a holdingring 5, the latter being secured to the surroundin wall 2 by removablescrews 6 and having recess portion 7 through which the 0peratlng portion8 of the operating ring a may extend. Preferably the operating ring 4;has one face thereof provided with an an nular depressed portion orpocket 9 and the blades 10 are pivoted at 11 to the face of the ringwithin the pocket so that free movement of the blades is permitted.The'blades 10 are extended through the opening of the ring elto theopposite face thereof, and their opposite ends are provided withopenings or the operating slots 11 which are adapted to be fitted overthe bearings or pivots 3 on the supporting or casing member 1.

In assembling the diaphragm, the blades 10 are preferably permanentlyand individually secured to the operating ring a while the latter isdetached from the supporting and adapted to be simultaneously fittedover the pivots or bearings on the casing or supporting member 1 whenthe operating ring and casing ring are assembled. The overlappingrelation of the blades holds them frictionally in the outer positions sothat there is no tendency for the blades to swing away from suchpositions.

From the foregoing it will be seen that there has been provided an irisdiaphragm of novel construction which permits the more ready assemblingof the parts. The blades are secured in the first instance to one of thering members oi the diaphragm and are projected through the opening ofsuch ring member so that their opposite ends lie on opposite sides ofthe ring member and the inner periphery of the ring member serves toposition the other pivot openings, thus permitting the free ends of theblades to be simultaneously applied to the bearings on the other ringmember of the diaphragm.

hat I claim as my invention and desire to secure by Letters Patent is 1.An iris diaphragm comprising two ring members, one of which is mountedto turn on the other, and blades pivotally connected to one of said ringmembers extending through the opening of the other ring member andpivotally connected to such other ring member.

2. An iris diaphragm comprising a supporting member having bearingsthereon, an operating ring, and blades pivotally mounted on one side ofsaid operating ring extending through the opening or said ring andhaving slots at their opposite ends detachably engaging with thehearings on the supporting member.

3. An iris diaphragm comprising a supporting member having pivotsprojecting from one face thereof, an operating ring mounted to turn onsaid supporting member, and blades pivotally connected to one face ofthe operating ring extending through the opening of said ring andadapted when in their outermost positions to cooperate with the innerperiphery of the ring in order to define the outer positions oi? saidblades, the ends of the blades being provided with slots adapted to :titover the pivot pins on the supporting member while the blades are intheir outer positions limited by the inner periphery oi the operatingring.

l. An iris diaphragm comprising two ring members, one oi? which ismounted to turn on the other, one of said ring members having aplurality 0i pivots projecting there from, blades pivotally coi'inectedto the other of said rin members and cooperating with portions or saidring member to limit the outward movement of said blades thereon, saidblades having openings therein which, when the blades cooperate with theportions of the ring member at their outer positions, will be sopositioned as to fit over the projecting pivots on the other ringmember.

RUDOLPH KLEIN.

